<template>
  <section class="main">
    <input id="toggle-all" class="toggle-all" type="checkbox" v-model="isCheckAll" />
    <label for="toggle-all">Mark all as complete</label>
    <ul class="todo-list">
      <!-- 当任务已完成，可以给 li 加上 completed 类，会让元素加上删除线 -->
      <li :class="{completed: item.isDone}" v-for="item in list" :key="item.id">
        <div class="view">
          <input class="toggle" type="checkbox" :checked="item.isDone" @change="change(item.id)" />
          <label>{{item.name}}</label>
          <button class="destroy" @click="del(item.id)"></button>
        </div>
      </li>

    </ul>
  </section>
</template>

<script>
export default {
  //  渲染
  props: {
    list: {
      type: Array,
      required: true
    }
  },
  //删除 功能  通过 $emit  把值传给 父组件
  methods: {
    del(id) {
      console.log(id);
      this.$emit('del', id)
    },
    //单个 勾选 状态   拿到 id 
    change(id) {
      this.$emit('change', id)
    },
  },
  computed: {
    isCheckAll: {
      get() {
        return this.list.every((item) => item.isDone === true)
      },
      set(value) {
        // console.log(value)
        this.$emit('checkAll', value)
      },
    },
  }
}
</script>

<style>
</style>